Get a bunch of newspaper and crumple it into balls until the tank is almost full. Prescent with extra stinky (what was she eating before? Mice?) bedding around her enclosure for a half an hour to 45 minutes.
Offer her food in the middle of the night (11-12a) after you've prescented.
How large is she in grams? If she is an adult, she can easily go some time without food. What was her history? You say you adopted her, is she a wild caught by any chance?
Any info you can give will help, like i said, it sounds like your set up is good temps and hide wise, but the constant trying to escape is not normal.